Definify.com
Webster 1913 Edition
Isologous
I-sol′o-gous
,Adj.
[
Iso-
+ Gr. λόγοσ
proportion.] (Chem.)
Having similar proportions, similar relations, or similar differences of composition; – said specifically of groups or series which differ by a constant difference;
as, ethane, ethylene, and acetylene, or their analogous compounds, form an
. isologous
series☞ Formerly the term
“Having the same percentage composition; – said of two or more different substances which contain the same ingredients in the same proportions by weight, often used with with. Specif.:
isomeric
applied also to comopounds having the same percentage chemical composition, even if the number of atoms in a molecule differed. In the 1913 dictionary isomeric
was defined as:“Having the same percentage composition; – said of two or more different substances which contain the same ingredients in the same proportions by weight, often used with with. Specif.:
(a)
Polymeric; i. e., having the same elements united in the same proportion by weight, but with different molecular weights; as, acetylene and benzine are
. See isomeric
(polymeric
) with each other in this sensePolymeric
. (b)
Metameric; i. e., having the same elements united in the same proportions by weight, and with the same molecular weight, but with a different structure or arrangement of the ultimate parts; as, ethyl alcohol and methyl ether are
. See isomeric
(metameric
) with each other in this senseMetameric
.” Definition 2024
isologous
isologous
English
Adjective
isologous (comparative more isologous, superlative most isologous)
- (chemistry) Having similar proportions, similar relations, or similar differences of composition; said specifically of groups or series which differ by a constant difference.
- Ethane, ethylene, an acetylene, or their analogous compounds form an isologous series.